▎ 摘　　要

NOVELTY - The utility model claims a magnetic graphene liquid crystal device capable of being repeatedly erased and written, comprising a shell, a first transparent writing board, second transparent writing board, magnetic painting and calligraphy pen, erasing rod, connecting rod and sealing plug, said first transparent writing board second transparent writing board are installed on the shell, and the first transparent writing board, between second transparent writing board with thickness of 0.01 to 5 cm of the cavity, the cavity of the upper lower two ends, left and right two ends are sealed through sealing glue; graphene magnetic dispersion is installed in the cavity; the cavity upper end sealing glue position is provided with a sealing plug, the sealing plug seamless contact with the connecting rod, and the connecting rod can move up and down on along the sealing plug centre line direction; the connection rod through a sealing plug, inserted to the lower end of the cavity and the erasing bar connection. The utility model through graphene liquid crystal change light propagation direction, presenting on the liquid for painting effect and capable of being repeatedly erased.